NEC MultiSync LCD1550ME Service Manual page 79

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Check the 3.3 V power are supplied on I310 pin 2.

Check if the voltage on I310

pin3 that is high level DC at 5V.

Is a dot clock being outputted under the

condition that a LCD module is connected

to P307 pin 44?

Check the H-sync pulse of negative polarity

is output on P307 pin 38 at TTL level.

Check the V-sync of negative polarity

are output on P307 pin 40.

Failure point

I310 Failure

1) I306 failure

2) Printed wire broke between I306 and P307 pin 44.

1) I306 failure

2) Printed wire broke between I306 and P307 pin 38.

1) I306 failure

2) Printed wire broke between I306 and P307 pin 40.

6-4

Failure point

Printed wire broke between P301 and I310

Failure point

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